Steam-boiler



(No Model.) 2 SheetsSheet 1.

J. A. VANDERVOORT.

STEAM BOILER.

No. 596,344. Patented Dec. 28, 1897.

WITNESSES.

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2 Sheets Sheet 2.

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lJNiTnD TATES ATENT rFicE.

JAMES A. VANDERVOORT, OF TRENTON, NEW JERSEY.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent 160,596,344, dated December 28, 1897.

Application filed April'8, 1896. $erial No. 586,661. (No model.)

To all whom it may concern.-

Be it known that I, J AMES ALBERT VAN- DERVOORT, a citizen of the United States, residing at Trenton, in the county of Mercer and State of New Jersey, have invented certain new and useful Improvements in Steam- Boilers; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in steam-boilers, and more particularly to that class known as Water-tube boilers, and has for its objects economy of space and lightness coupled with large steam capacity, thus rendering such boilers to be used with great advantage upon small steam-launches.

WVith these ends in view my invention consists in the novel details of construction and arrangement hereinafter more fully described and claimed.

In order that those skilled in the art may fully understand how to make and use my improved boiler, I will proceed to describe the construction and operation of the same, referring by letters and numerals to the accompanying drawings, in which Figure 1 is an end elevation partly in section. Fig. 2 is a side elevation partly in section. Fig. 3 is a front elevation with the inclosing casing.

Similar letters and numerals of reference denote like parts in the several figuresof the drawings.

A represents any suitable foundation or support upon which are erected at suitable distances apart cast-metal saddles or supporting angle-irons B, which are concaved, as clearly shown at Fig. 1, to receive and support the lower headers of the tube construction, as will be hereinafter described.

O are the heating-tubes,which are expanded and capped in the upper and lower tubesheets D. The tube-sheets extend laterally, as clearly shown at Fig. 1, and are secured by bolts E to flanges F on the cast-steel headers G G, the former being the lower headers and the latter the upper headers. The lower headers are semicylindrical, while the upper headers are prolonged after making a halfcircle and are strengthened by longitudinal plates H, which are bolted, as seen, to the parallel sides of the upper headers.-

I are a series of separated bridges toprevent collapse.

J are a series of stay-rods arranged at suitable distances apart, which pass through a heating-tube and through the heaters G and G and are securely fastened by nuts K, thus adding strength to the structures.

The two banks of tubes are mounted in the saddles or supporting-irons B in converging relation, and the saddles B at their extreme upper portions are horizontally inclined accordingly and support, as clearly shown, the the flanges F. The saddles are also formed with vertically-inclined flanges which embrace the lower edges of the iron casing or jacket M.

The dotted line 00 01:, Fig. 1, represents the water-line of the boiler, and above this line the upper headers G at each end are connected by steam-circulating tubes N, which connect through vertical legs 0 with the steam-drum P and dulysupport the same.

Q are circulating-tubes connecting the two ends of the lower headers G. Additional and smaller steam-circulating pipes R may be employed to connect the two ends of the upper headers G,and similar pipe connections S may be made with the ends of the lower headers to increase the water circulation.

The steam-drum is closed at each end by flanged heads securely bolted in place, and an axial or central rod T, secured by nuts U, strengthens the same.

-Vis a tubular connection on the outside of the front of the jacket or casing L, connecting the steam-drum and the ends of the lower headers G, and is provided with intermediate steam and water gages W and suitable petcocks, as clearly shown at Fig. 2.

1 1 are steam-pipesleading from the steam drum, and 2 is an ordinary safety-valve connected in the usual manner with the drum.

Metal stirrups or bridges Y are arranged across the fire-chamber at suitable distances apart, and longitudinal grate-bars Z are located and held within slots in the upper surfaces of the stirrups, as clearly illustrated at Fig. 1.

a are fire-brick surrounding the grate and at the front and rear ends extending up to a line coincident with the top of the stokingdoor.

1) is the ash-pan,\vhich slides longitudinally under the grate and is free to be drawn out for the removal of the ashes.

The sides of the sheet-metal jacket or casing are inclined, as shown, and the entire interior surface is lined with any suitable nonconducting materialsuch, for instance, as asbestos.

From the construction shown it will be seen that the heat generated in the fire-chamber must necessarily circulate freely through the heating tubes and passing between and around the upper headers G and around and over the steam-drum P in its course to the smokestack 3 tends to expand or superheat the steam. It will also be observed that the construction and arrangement of the headers with reference to the heating-tubes is such that by releasing the nuts on the several se curing bolts and rods the headers can be readily removed, thus exposing the tube-sheets and the open ends of the heating-tubes, so that the latter can be overhauled and cleaned with facility.

hen thought desirable for economy of space, the steam-drum P may be omitted, and the steam may be taken directly from the steam-space in the upper headers G and the tube V, connected with the upper and lower headers G and G.

The construction and arrangement of the grate-bars l and the supporting-stirrups Y, resting on the flanges of the lower headers G and tube-sheet, is such that repairs and substition can be readily and expeditiously made.

The entire structure is of compact form and at the same time securing efficient steam-making properties and complete circulation.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The two banks of heating-tubes 0' secured at each end in the tube-sheets D, closed by upper and lower steel headers G, G, and mounted in converging position in saddles B, in combination with the steam-circulating pipes N, and water-circulating pipes Q, tubular connection V, steam-drum P, connection S, stirrups Y, grate-bars Z, and jacket or casing L, substantially as and for the purpose set forth.

2. The heating-tubes C, secured in the tubesheets D, extended laterally as described, in combination with the cast-steel headers G, G, the latter being strengthened by longitudinal plates II and bridges I, and provided with flanges F, bolts E passing through the lateral extensions of the tube-sheets and the flanges F, and stay-rods J ,whereby the tubes may be exposed for repair or cleaning, substantially as hereinbefore set forth.

3. The banks of heating-tubes C provided with the removable headers G, G, the latter mounted upon saddles B, having concave seats and horizontally and vertically oblique flanges, in combination with the converging jacket or casing L, substantially as and for the purposes set forth.

l. The two banks of heating-tubes C closed by headers G, G, in combination with the stirrups Y mounted upon the tubesheets, and flanges of the lower headers G, and the gratebars Z, mounted and supported within slots in the stirrups,whereby the stirrups and gratebars may be readily removed and replaced, substantially as hereinbefore described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES A. VANDERVOORT. lVitnesses:

ASHER M. THOM, HENRY O. IIoUsELL. 

